Succession in Philippine law is the transmission of the estate, rights, and obligations of a deceased person to his or her heirs, whether by will or by operation of law. It is governed primarily by Book III of the Civil Code of the Philippines (Republic Act No. 386), which took effect on August 30, 1950. The rules on succession are both mandatory and directory, reflecting a blend of Spanish civil law traditions, American influences, and Filipino customary practices. The fundamental principle is that the deceased’s property passes to the heirs at the moment of death, subject to the payment of debts, taxes, and legitimate claims.

I. General Provisions on Succession

Succession may be classified into three kinds: testamentary succession (by will), legal or intestate succession (by operation of law), and mixed succession (partly by will and partly by law). The estate includes all property, rights, and obligations of the decedent that are not extinguished by death. Transmission occurs at the exact moment of death, even before judicial declaration. The heirs acquire a right to the inheritance from the moment of death, though possession and administration may require probate or extrajudicial settlement.

Capacity to succeed is governed by Articles 1024 to 1029 of the Civil Code. Any person who is not disqualified by law may inherit. Incapacity arises from (1) lack of juridical capacity, (2) unworthiness (e.g., conviction for certain crimes against the decedent), or (3) specific prohibitions such as those involving the decedent’s spouse or ascendants in certain cases. Representation is allowed in the direct descending line to prevent the transmission from lapsing.

II. Testamentary Succession: The Law of Wills

A will is a personal, revocable, and ambulatory act by which a person disposes of his or her estate to take effect after death. It is strictly personal; no one may make a will through an agent. The testator must be of sound mind and at least eighteen years of age.

A. Kinds of Wills

Philippine law recognizes two principal types of wills:

Notarial or Ordinary Will – This is the most common form. It must be in writing, executed in a language or dialect known to the testator, and subscribed by the testator and at least three witnesses. The will must be acknowledged before a notary public. Formalities under Articles 805 to 809 are mandatory: the testator and witnesses must sign every page (except the last, which requires only the signatures of the testator and witnesses), the attestation clause must state the number of pages, and the notary must certify the due execution.

Special rules apply to wills executed by Filipinos abroad (Article 815) and by aliens in the Philippines (Article 817). A person who cannot read or write may execute a notarial will with the assistance of another, provided the formalities are strictly observed.
Holographic Will – This is entirely handwritten, dated, and signed by the testator. No witnesses or notary are required. It may be executed in any language or dialect known to the testator. For Filipinos abroad, the holographic will is valid if it complies with the law of the place of execution or Philippine law. A holographic will may be probated even if not dated, provided the date can be supplied by extrinsic evidence in certain cases, but the general rule is strict compliance with the handwriting, date, and signature requirements.

Joint wills are prohibited except in the case of mutual wills executed by spouses in the same instrument, which is allowed only if they are Filipinos and the will complies with notarial formalities.

B. Codicils and Revocation

A codicil is a supplement or amendment to a will. It must be executed with the same formalities as the original will. Revocation of a will may be express or implied. Express revocation occurs by a subsequent will or codicil. Implied revocation happens when the testator performs acts inconsistent with the will (e.g., alienation of the property). Revocation by law occurs in cases such as the birth of a child after the will is made, if the child is not provided for.

A will may be revived by republication (re-execution) or by a codicil expressly referring to it.

C. Probate and Allowance of Wills

No will shall pass either real or personal property unless it is proved and allowed in a proper court proceeding (probate). Probate is a special proceeding where the court determines the due execution and validity of the will. Once allowed, the will becomes conclusive as to its due execution. Extrinsic evidence is admissible to prove due execution but not to vary the terms of the will.

The probate court has jurisdiction over the settlement of the estate. If the decedent left a will, the proceeding is called testate settlement; otherwise, it is intestate.

III. Intestate or Legal Succession

Intestate succession applies when: (1) there is no will; (2) the will is void or has been revoked; (3) the will does not dispose of all property (in which case the undisposed portion goes by intestacy); or (4) the heir renounces or is disqualified.

The order of intestate heirs is strictly hierarchical:

Legitimate children and descendants (including those by representation).
Legitimate parents and ascendants (only in default of descendants).
Illegitimate children (concurring with legitimate children but receiving half the share).
Surviving spouse (concurs with children or parents; takes the entire estate if no other heirs).
Collaterals – brothers and sisters (full or half-blood), nephews and nieces, and more distant collaterals up to the fifth degree.
The State – if there are no heirs within the fifth degree, the estate escheats to the government.

Rules of proximity and representation govern. Representation is allowed only in the direct descending line. Among collaterals, nephews and nieces represent their deceased parents. The nearer degree excludes the more remote, except in representation.

IV. Compulsory Heirs and Legitime

Philippine law protects compulsory heirs through the concept of legitime, which is the portion of the estate that cannot be freely disposed of by will. Compulsory heirs are:

Legitimate children and descendants.
Legitimate parents and ascendants (in default of the first).
The surviving spouse.
Illegitimate children.

The legitime of legitimate children is one-half of the estate, divided equally. The surviving spouse receives a share equal to that of a legitimate child. Illegitimate children receive one-half of the share of a legitimate child. Parents and ascendants receive one-half of the estate if there are no descendants.

The free portion (the other half) may be disposed of freely by will. Any disposition that impairs the legitime may be reduced or annulled through an action for inofficious donation or reduction of legacies.

V. Disinheritance and Preterition

Disinheritance is the deprivation of a compulsory heir of his or her legitime for a just cause expressly stated in the will. Causes for disinheritance of children and descendants are enumerated in Article 919 (e.g., attempt against the life of the testator, abandonment, refusal to support). Similar but distinct grounds apply to ascendants and the spouse.

Preterition occurs when a compulsory heir in the direct line is omitted from the will without being expressly disinherited. The effect is the annulment of the institution of heirs, but legacies and devises remain valid insofar as they do not impair the legitime.

VI. Donations Mortis Causa and Inter Vivos

A donation mortis causa is one made in contemplation of death and is essentially testamentary in character. It must comply with the formalities of a will; otherwise, it is void. Donations inter vivos are governed by the law on donations and may be revoked for ingratitude or inofficiousness if they impair the legitime.

VII. Partition and Distribution of the Estate

Partition may be by agreement among the heirs (extrajudicial settlement) or by judicial decree. Extrajudicial settlement is allowed when there is no will and no debts, provided all heirs are of legal age and agree. A public instrument must be executed and registered with the Register of Deeds. If there is a will, judicial probate is mandatory before partition.

The estate is liable for the debts of the decedent, funeral expenses, taxes, and administration expenses before distribution. Heirs are liable only up to the value of the property received (beneficiary liability).

VIII. Special Rules and Considerations

Succession by Adoption: Adopted children have the same rights as legitimate children.
Succession of Illegitimate Children: Recognized illegitimate children inherit equally with legitimate children in certain proportions.
Surviving Spouse: The spouse must be legally married at the time of death.
Alienation of Hereditary Rights: Before partition, an heir may sell, cede, or mortgage his undivided share, but the sale is subject to the right of redemption by co-heirs.
Wills by Filipinos Abroad: Governed by the law of the place of execution or Philippine law, whichever is more favorable.
Renunciation and Acceptance: An heir may accept or renounce the inheritance. Acceptance may be express or tacit; renunciation must be in writing and notarized if it involves real property.
Collation: Donations made by the decedent during life to compulsory heirs are collated (brought back into the estate) for the purpose of determining legitime, unless expressly exempted.
Trusts and Fiduciary Institutions: Philippine law recognizes testamentary trusts, though they are not as commonly used as in common-law jurisdictions.

IX. Procedural Aspects of Estate Settlement

Estate proceedings may be testate or intestate. The Regional Trial Court (as a special probate court) has exclusive jurisdiction. Venue lies in the province where the decedent was domiciled at the time of death, or where the estate is situated if the decedent was a non-resident.

Summary settlement is permitted for small estates (gross value not exceeding PHP 500,000 for extrajudicial settlement or PHP 2,000,000 for summary judicial proceedings under Republic Act No. 10963, the TRAIN Law, as adjusted). Affidavit of self-adjudication is allowed when there is only one heir.

Taxes (estate tax under the National Internal Revenue Code, as amended by the TRAIN Law and subsequent reforms) must be paid before distribution. The estate tax rate is a flat 6% on the net estate.

X. Recent Legislative Developments and Jurisprudential Trends

The Civil Code remains the bedrock, but amendments through special laws have refined certain procedures. Republic Act No. 8561 and later tax reforms simplified estate tax computation and increased thresholds. Jurisprudence from the Supreme Court emphasizes strict compliance with will formalities to prevent fraud, while liberally construing holographic wills when the handwriting is clearly that of the testator. The Court has consistently upheld the protection of legitime as a matter of public policy.

In practice, estate planning in the Philippines often involves notarial wills combined with inter vivos donations to minimize taxes and avoid prolonged probate. For overseas Filipinos, dual compliance with Philippine and foreign law is advisable.

The law on wills and succession balances testamentary freedom with familial protection, ensuring that the decedent’s last wishes are respected while safeguarding the rights of compulsory heirs. It remains one of the most technical and litigation-prone areas of Philippine civil law, requiring meticulous attention to both substantive rules and procedural formalities.